Larry Willis, president of the transportation trades department at the AFL-CIO,...Larry Willis, president of the transportation trades department at the AFL-CIO, right, speaks as Greer Woodruff, senior vice president of safety, security, and driver personnel at J.B. Hunt Transport Inc. from left, Susan Alt, senior vice president of public affairs at Volvo Group North America Inc., and Jane Terry, senior director of government affairs at the National Safety Council, listen during a House Highways and Transit Subcommittee roundtable discussion in Washington, D.C., U.S., on Thursday, Dec. 7, 2017. The roundtable focused on emerging technologies being utilized or explored in the trucking industry. Photographer: Andrew Harrer/Bloomberg via Getty ImagesNascondi dettagliMostra dettagli

Susan Alt, senior vice president of public affairs at Volvo Group North America Inc., speaks during a House Highways and Transit Subcommittee roundtable discussion in Washington, D.C., U.S., on Thursday, Dec. 7, 2017. The roundtable...Mostra dettagli

Susan Alt, senior vice president of public affairs at Volvo Group North America...Susan Alt, senior vice president of public affairs at Volvo Group North America Inc., speaks during a House Highways and Transit Subcommittee roundtable discussion in Washington, D.C., U.S., on Thursday, Dec. 7, 2017. The roundtable focused on emerging technologies being utilized or explored in the trucking industry. Photographer: Andrew Harrer/Bloomberg via Getty ImagesNascondi dettagliMostra dettagli

Larry Willis, president of the transportation trades department at the AFL-CIO, speaks during a House Highways and Transit Subcommittee roundtable discussion in Washington, D.C., U.S., on Thursday, Dec. 7, 2017. The roundtable focused...Mostra dettagli

Larry Willis, president of the transportation trades department at the AFL-CIO,...Larry Willis, president of the transportation trades department at the AFL-CIO, speaks during a House Highways and Transit Subcommittee roundtable discussion in Washington, D.C., U.S., on Thursday, Dec. 7, 2017. The roundtable focused on emerging technologies being utilized or explored in the trucking industry. Photographer: Andrew Harrer/Bloomberg via Getty ImagesNascondi dettagliMostra dettagli

Representative Sam Graves, a Republican from Missouri and chairman of the Highways and Transit Subcommittee, listens during a roundtable discussion in Washington, D.C., U.S., on Thursday, Dec. 7, 2017. The roundtable focused on...Mostra dettagli

Representative Sam Graves, a Republican from Missouri and chairman of the Highways...Representative Sam Graves, a Republican from Missouri and chairman of the Highways and Transit Subcommittee, listens during a roundtable discussion in Washington, D.C., U.S., on Thursday, Dec. 7, 2017. The roundtable focused on emerging technologies being utilized or explored in the trucking industry. Photographer: Andrew Harrer/Bloomberg via Getty ImagesNascondi dettagliMostra dettagli

Representative Sam Graves, a Republican from Missouri and chairman of the Highways and Transit Subcommittee, left, and Representative Eleanor Holmes Norton, a Democrat from the District of Columbia, listen during a House Highways and...Mostra dettagli

Representative Sam Graves, a Republican from Missouri and chairman of the Highways...Representative Sam Graves, a Republican from Missouri and chairman of the Highways and Transit Subcommittee, left, and Representative Eleanor Holmes Norton, a Democrat from the District of Columbia, listen during a House Highways and Transit Subcommittee roundtable discussion in Washington, D.C., U.S., on Thursday, Dec. 7, 2017. The roundtable focused on emerging technologies being utilized or explored in the trucking industry. Photographer: Andrew Harrer/Bloomberg via Getty ImagesNascondi dettagliMostra dettagli

Representative Eleanor Holmes Norton, a Democrat from the District of Columbia, speaks during a House Highways and Transit Subcommittee roundtable discussion in Washington, D.C., U.S., on Thursday, Dec. 7, 2017. The roundtable focused...Mostra dettagli

Representative Eleanor Holmes Norton, a Democrat from the District of Columbia,...Representative Eleanor Holmes Norton, a Democrat from the District of Columbia, speaks during a House Highways and Transit Subcommittee roundtable discussion in Washington, D.C., U.S., on Thursday, Dec. 7, 2017. The roundtable focused on emerging technologies being utilized or explored in the trucking industry. Photographer: Andrew Harrer/Bloomberg via Getty ImagesNascondi dettagliMostra dettagli

Larry Willis, president of the transportation trades department at the AFL-CIO, listens during a House Highways and Transit Subcommittee roundtable discussion in Washington, D.C., U.S., on Thursday, Dec. 7, 2017. The roundtable focused...Mostra dettagli

Larry Willis, president of the transportation trades department at the AFL-CIO,...Larry Willis, president of the transportation trades department at the AFL-CIO, listens during a House Highways and Transit Subcommittee roundtable discussion in Washington, D.C., U.S., on Thursday, Dec. 7, 2017. The roundtable focused on emerging technologies being utilized or explored in the trucking industry. Photographer: Andrew Harrer/Bloomberg via Getty ImagesNascondi dettagliMostra dettagli